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• This is a crash. Please upload, Pastebin, Gist or copypaste the whole crash report along with this issue.

• This is a mod incompatibility. If I do this in vanilla Forge with only Et Futurum Requiem installed, it works normally.

Version number of Et-Futurum-Requiem (IMPORTANT)

Et_Futurum_Requiem-2.4.3.jar

Describe the issue (IMPORTANT)

I created an spawner with Shulkers, I change the difficulty to peaceful, and they keep spawning. They don't attack, but I think they shouldn't spawn

Mod list (OPTIONAL)

Additional Context (OPTIONAL)